$bai: 100%;
/************************************************* nav部分 *************************************************/ 
.nav-login{
    padding-left: 56px;
}
/*********************************************** banner部分 ************************************************/  
.banner{
    overflow: hidden;
}
.banner video{
    width: $bai;
}
.banner>img{
    width: 866px;
    height: 82px;
    display: block;
    position: absolute;
    top: 22%;
    left: 50%;
    transform: translateX(-50%);
}
.input-box{
    top: 44%;
}
.input-txt{
    width: 658px;
    padding-left: 10px;
}
.hot-search{
    top: 60%;
}
/************************************************* poly部分 ************************************************/
.poly{
    width: 1104px;
    height: 156px;
    margin: 72px auto 0;
}
.poly li{
    width: 368px;
    height: $bai;
}
.poly-img{
    width: 60px;
    height: 60px;
    margin: 0 auto;
    
}
.poly-img img{
    width: 50px;
    display: block;
    margin: 0 auto;
}
.poly-tit,.poly-inner{
    width: $bai;
    text-align: center;
    letter-spacing: 1px;
}
.poly-tit{
    font-size: 24px;
    font-weight: bold;
    color: #1f1f1f;
    padding-top: 10px;
    line-height: 35px;
}
.poly-inner{
    font-size: 16px;
    color: #666666;
    line-height: 26px;
}
/************************************************* video部分 ***********************************************/
.video,.special,.explore,.trend{
    width: $bai;
    padding-top: 104px;
}
.video-banner,.special-list li,.new-hot li{
    background-repeat: no-repeat;
    background-position: center;
    transition: all .3s;
}
.video-banner{
    width: $bai;
    height: 621px;
    background-image: url(https://ali.image.hellorf.com/images/72935b88911c2bb64c5080825341e620.png);
    background-size: 1104px;
    cursor: pointer;
}
.video-banner div{
    width: 75px;
    height: 75px;
    // text-align: center;
    // line-height: 620px;
    font-size: 75px;
    color: rgba(255,255,255,.5);
    cursor: pointer;
    transition: all .3s;
    margin: 0 auto;
    padding-top: 273px;
    font-weight: bold;
}
.video-banner:hover div{
    color: white;
}
.video-btn{
    width: 152px;
    height: 40px;
    display: block;
    border: 4px solid #1f1f1f;
    text-align: center;
    line-height: 32px;
    font-size: 16px;
    color: #1f1f1f;
    margin: 40px auto 0;
}
.video-btn:hover{
    background-color: rgba(31, 31, 31, 0.08);
}
/************************************************ special部分 **********************************************/
.special-list{
    width: $bai;
    height: 272px;
}
.special-list li{
    width: 540px;
    height: $bai;
    background-size: 540px;
}
.special-list li:hover{
    box-shadow: 0 2px 15px 4px rgba($color: #000000, $alpha: .3);
}
.special01{
    background-image: url(https://ali.image.hellorf.com/images/13601391380ea6a6341597bd39b8c6be.jpeg?x-oss-process=image/resize,h_544);
}
.special02{
    background-image: url(https://ali.image.hellorf.com/images/13d6cd82a99b200a30f596c62aff33b6.jpeg?x-oss-process=image/resize,h_544);
}
.selected{
    padding-top: 120px;
}
/************************************************ explore部分 **********************************************/
.start-hot a{
    line-height: normal;
    padding-top: 105px;
}
.start-hot a p:nth-of-type(2){
    font-size: 16px;
    font-weight: lighter;
    padding-top: 10px;
    letter-spacing: 1px;
}
.new-hot li{
    background-size: 352px;
}
.sea{
    background-image: url(https://ali.image.hellorf.com/images/e9364670d4f4e13b0a6f7bc0a16d18f5.jpeg?x-oss-process=image/resize,h_528);
}
.pool{
    background-image: url(https://ali.image.hellorf.com/images/aaf73e9c09733e6b93aefaeeae4298c0.jpeg?x-oss-process=image/resize,h_528);
}
.virus{
    background-image: url(https://ali.image.hellorf.com/images/1c6607d3c27079003535bc28d16a390d.jpeg?x-oss-process=image/resize,h_528);
}
.care{
    background-image: url(https://ali.image.hellorf.com/images/097ad169be9785828c071965ab74bce4.jpeg?x-oss-process=image/resize,h_528);
}
.mask{
    background-image: url(https://ali.image.hellorf.com/images/7ada1e164aa1e62b1b8a622d615d3e84.jpeg?x-oss-process=image/resize,h_528);
}
.ice{
    background-image: url(https://ali.image.hellorf.com/images/7c3d9fab65f602ef4cfb83e98fc33e44.jpeg?x-oss-process=image/resize,h_528);
}
.design-btn{
    margin: 40px auto 0;
}
/************************************************* trend部分 **********************************************/
.keyword{
    width: 60px;
}
.trend{
    padding-bottom: 104px;
}
.trend .new-hot li{
    height: 200px;
}
.trend .new-hot li a{
    padding-top: 90px;
}
.delay{
    background-image: url(https://ali.image.hellorf.com/images/14f3b5632ee9a6fbf30db57d7de48b7a.jpeg?x-oss-process=image/resize,h_400);
}
.motion{
    background-image: url(https://ali.image.hellorf.com/images/d95c556128501013bab16045009853bd.jpeg?x-oss-process=image/resize,h_400);
}
.trend-lab{
    width: $bai;
    margin-top: 44px;
    display: flex;
    flex-wrap: wrap;
}
.trend-lab li{
    height: 38px;
    background-color: white;
    border-radius: 100px 0px 0px 100px;
    margin: 0 22px 24px 0;
}
.trend-lab li a{
    height: $bai;
    display: block;
    padding: 0 20px 0 34px;
    line-height: 38px;
    font-size: 16px;
    color: #1f1f1f;
    transition: all .3s;
    position: relative;
}
.trend-lab li a:hover{
    color: #ea4335;
}
.trend-lab li a::before{
    content: "";
    width: 6px;
    height: 6px;
    display: block;
    border-radius: 50%;
    background-color: #f0f4f5;
    position: absolute;
    top: 50%;
    left: 10px;
    transform: translateY(-50%);
}